asp.net - 通过 ASP.Net 确定 Windows Server 的运行时

Question

在任何 ASP.net 类中是否有一个内置属性来确定运行网络应用程序的网络服务器的正常运行时间是多少？

这些是我脑海中突然出现的一些可能性:

• global.asax 和 Application_OnStart 事件。获取时间戳并确定正常运行时间，我只是从 DateTime.Now 中减去它
• 编写一个 windows 服务(自动启动)，其唯一目的是将服务启动的值存储在某处

但这两者都没有提供“内置”解决方案。在 .net 框架中有什么我可以监督的吗？

Answer 1

要获得系统正常运行时间，请使用以下代码:

TimeSpan uptime;
using (var uptimeCounter = new PerformanceCounter("System", "System Up Time")) {
    uptimeCounter.NextValue();
    uptime = TimeSpan.FromSeconds(uptimeCounter.NextValue());
}

编辑:请注意，这不能由部分受信任的代码使用。
您可以使用 TimeSpan.FromMilliseconds(Environment.TickCount)，但它会在两周后换行。

---

我在 ASP.Net 中写了一个服务器状态页面，显示服务器正常运行时间等。
这是整个页面:

<%@ Page Title="Server Stats" Language="C#" MasterPageFile="~/Admin.Master" AutoEventWireup="true"
    CodeFile="Stats.aspx.cs" Inherits="Stats" %>

<%@ Import Namespace="System.Diagnostics" %>
<%@ Import Namespace="Microsoft.VisualBasic.Devices" %>
<asp:Content ID="Content1" ContentPlaceHolderID="head" runat="Server">
    <style type="text/css">
        body {
            background-color: #9DC0E4;
        }
        table.Details {
            width: 550px;
            margin-left: -275px;
            left: 50%;
            position: absolute;
        }
        table.Details tbody.Group {
            border-bottom: solid black 2px;
            margin-bottom: 15px;
        }
        table.Details th.Group {
            font-size: x-large;
            border-bottom: dashed 1px navy;
        }
        table.Details th.Name {
            text-align: left;
        }
        table.Details td.Value {
            text-align: right;
        }
    </style>
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" runat="Server">
    <%
        var computer = new ComputerInfo();
        using (var iis = Process.GetCurrentProcess())
        using (var cpu = new PerformanceCounter("Processor", "% Processor Time", "_Total"))
        using (var uptime = new PerformanceCounter("System", "System Up Time")) {
            cpu.NextValue();
            uptime.NextValue();
    %>
    <table class="Details">
        <tbody class="Group">
            <tr>
                <th class="Group" colspan="2">Environment</th>
            </tr>
            <tr>
                <th class="Name">Local server time</th>
                <td class="Value">
                    <%= DateTime.Now.ToString("F")%></td>
            </tr>
            <tr>
                <th class="Name">OS</th>
                <td class="Value">
                    <%= computer.OSFullName%><br />
                    <%= Environment.OSVersion.ToString()%></td>
            </tr>
            <tr>
                <th class="Name">Machine name</th>
                <td class="Value">
                    <%= Environment.MachineName%></td>
            </tr>
            <tr>
                <th class="Name">User name</th>
                <td class="Value">
                    <%= Environment.UserName%></td>
            </tr>
            <tr>
                <th class="Name">Windows domain</th>
                <td class="Value">
                    <%= Environment.UserDomainName%></td>
            </tr>
        </tbody>
        <tbody class="Group">
            <tr>
                <th class="Group" colspan="2">IIS</th>
            </tr>
            <tr>
                <th class="Name">IIS Uptime</th>
                <td class="Value">
                    <%= (DateTime.Now- iis.StartTime).ToApproximateString()%></td>
            </tr>
            <tr>
                <th class="Name">Priority</th>
                <td class="Value">
                    <%= iis.PriorityClass%></td>
            </tr>
            <tr>
                <th class="Name">Physical Memory Used</th>
                <td class="Value">
                    <%= ToSizeString(iis.WorkingSet64)%></td>
            </tr>
            <tr>
                <th class="Name">Virtual Memory Used</th>
                <td class="Value">
                    <%= ToSizeString(iis.VirtualMemorySize64)%></td>
            </tr>
        </tbody>
        <tbody class="Group">
            <tr>
                <th class="Group" colspan="2">Hardware</th>
            </tr>
            <tr>
                <th class="Name">Processors</th>
                <td class="Value">
                    <%= Environment.ProcessorCount.ToString()%></td>
            </tr>
            <tr>
                <th class="Name">Physical memory</th>
                <td class="Value">
                    <%= ToSizeString(computer.TotalPhysicalMemory)%></td>
            </tr>
            <tr>
                <th class="Name">Virtual memory</th>
                <td class="Value">
                    <%= ToSizeString(computer.TotalVirtualMemory)%></td>
            </tr>
        </tbody>
        <tbody class="Group">
            <tr>
                <th class="Group" colspan="2">Performance</th>
            </tr>
            <tr>
                <th class="Name">Uptime</th>
                <td class="Value">
                    <%= TimeSpan.FromSeconds(uptime.NextValue()).ToApproximateString()%>
                </td>
            </tr>
            <tr>
                <th class="Name">CPU Usage</th>
                <td class="Value">
                    <%= (cpu.NextValue()/100).ToString("p")%>
                </td>
            </tr>
            <tr>
                <th class="Name">Physical memory free</th>
                <td class="Value">
                    <%= ToSizeString(computer.AvailablePhysicalMemory)%></td>
            </tr>
            <tr>
                <th class="Name">Virtual memory free</th>
                <td class="Value">
                    <%= ToSizeString(computer.AvailableVirtualMemory)%></td>
            </tr>
        </tbody>
    </table>
    <%} %>
</asp:Content>

ToSizeString定义在.cs文件中:

protected static string ToSizeString(double bytes) {
    var culture = CultureInfo.CurrentUICulture;
    const string format = "#,0.0";

    if (bytes < 1024)
        return bytes.ToString("#,0", culture);
    bytes /= 1024;
    if (bytes < 1024)
        return bytes.ToString(format, culture) + " KB";
    bytes /= 1024;
    if (bytes < 1024)
        return bytes.ToString(format, culture) + " MB";
    bytes /= 1024;
    if (bytes < 1024)
        return bytes.ToString(format, culture) + " GB";
    bytes /= 1024;
    return bytes.ToString(format, culture) + " TB";
}

ToApproximateString 是在别处定义的扩展方法:

public static string ToApproximateString(this TimeSpan time) {
    if (time.TotalDays > 14)
        return ((int)(time.TotalDays / 7)).ToString("#,0.0") + " weeks";
    if (14 - time.TotalDays < .75)
        return "two weeks";
    if (time.TotalDays > 1)
        return time.TotalDays.ToString("#,0.0") + " days";
    else if (time.TotalHours > 1)
        return time.TotalHours.ToString("#,0.0") + " hours";
    else if (time.TotalMinutes > 1)
        return time.TotalMinutes.ToString("#,0.0") + " minutes";
    else
        return time.TotalSeconds.ToString("#,0.0") + " seconds";
}